Avenue’s stone-faced doorman, Wass Stevens, showed a softer side the other night at the 34th-birthday party of Anisha Lakhani, the former Dalton teacher who wrote “Schooled.” When friends Kimberly Guilfoyle, Gigi Stone and Dabney Mercer brought out her birthday cake at midnight, Stevens came in to give her a big, long public kiss in front of shocked guests, including Chessy Wilson, Peter Davis, Nicole Romano, designer Thuy Diep and Dorrian’s Red Hand owner Jimmy Dorrian, who stayed until the end of the night with Avenue co-owner Rich Thomas. “It was surreal to see Jimmy and Rich drinking together,” a spy told The Post’s Annie Karni. “They’re kings of different empires.” Meanwhile, the dysfunctional cast of canceled reality-TV show “High Society” — Jules Kirby, Paul Johnson Calderon and Tinsley Mortimer — sat together “happy as clams” — more proof that all the on-screen drama was fake.